We put up some frosted film on the lower portion of our living room windows a couple weeks ago. I'm a wee bit surprised by how much I like it! Our windows look directly down into our neighbor's yard and adding the film brings privacy to our space and to theirs. Win-win!
Prior to the film we had white sheets covering the windows (yeah...). The space has a completely different look and feel now (much more grownup not to mention much more light).
...Still haven't cleaned the outside of the windows after replacing some of the smaller panes. That last photo brings on the shame!